Can anyone comment on how widely used the TRON Character Code is today?
After doing some surfing on the topic, it appears to be in at least some
use (primarily in Japan?) I hadn't thought there were any viable
alternatives to Unicode out there, and was surprised to see TRON looking
as alive as it does.

So how popular -is- TRON?

Also, are there other universal character sets lurking out there as
well?

Contact me to join the North East Localization Special Interest Group,
an email discussion list which focuses on globalization issues. (Or
subscribe yourself by going to http://groups.yahoo.com/group/nelocsig)